Abstract:
:Lysine-rich (Lys-rich) proteins encoded by AGP17, AGP18, and AGP19 genes are cell wall-associated glycopeptides related to sexual reproduction in flowering plants. This subclass belongs to classical arabinogalactan proteins (AGPs) widely studied in model plants like Arabidopsis. In this study, we identified the CaAGP18 cDNA from bell pepper (Capsicum annuum L.), as well as its expression pattern during vegetative and reproductive development. The deduced amino acid sequence revealed a Lys-rich AGP18 protein of 238 amino acids residues in length with an estimated molecular mass of 22.85 kDa and an isoelectric point of 9.7. The protein is predicted as canonical AGP due to the presence of a small Lys-rich region and a C-terminal sequence essential for posttranslational modification with a glycosylphosphatidylinositol (GPI). Phylogenetic analysis showed that CaAGP18 is clustered together with NtAGP18, SpAGP18, StAGP18 and NaAGP18 from Solanaceae species. CaAGP18 expression through plant phenological stages had the highest transcription level in leaves at the seedling stage, whereas in reproductive organs there was a significant up-regulation in pistils during anthesis, also in petals 2 days post-anthesis (DPA), and in fruit at the expansion stage. Our results open future research for possible roles of CaAGP18 in cell expansion as a wall-associated plasticizer and reproductive processes like pistil interactions and petal cell death.
journal_name
3 Biotechjournal_title
3 Biotechauthors
Verdugo-Perales M,Velez-de la Rocha R,León-Félix J,Osuna-Enciso T,Heredia JB,Osuna-Castro JA,Islas-Osuna MA,Sañudo-Barajas JAdoi
10.1007/s13205-017-1031-zsubject
Has Abstractpub_date
2018-01-01 00:00:00pages
5issue
1eissn
2190-572Xissn
2190-5738pii
1031journal_volume
8pub_type
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